In Amazing Spider-Girl # 19 (2008), Peter shows May a Daily Bugle headline. The paper clearly shows that the date is Tuesday, March 28, 1996 (a Thursday in our universe), meaning that the modern MC2 stories take place in the mid-nineties, ironic considering the MC2 universe was started, with Spider-Girl, in 1998.
Here's the image they are referring to from Amazing Spider-Girl #19 (2008):
'But wait!' I hear you say, 'clearly that proves the modern MC2 takes place in the mid-nineties!' Well, no. Not really. Why? Well for starters, there is this little wrinkle which comes from Spider-Girl #33 (2001):
No, you don't need to adjust your screen! It really does give the date as Saturday, February 19, 2017. WHA?! 'Well, what does that mean? Is the MC2 set in the future or the past?' I hear you ponder loudly. The answer is neither. The MC2 is happening right now.
As I've covered before by deferring to the Official Handbook of the Marvel Universe A to Z Vol. 7: 'Though the MC-2 features a sliding timescale similar to Earth-616, it is not set in the future, but rather in the present, in this world, the Heroic Age occurred nearly fifteen years in the past.'
Essentially, any mentions of real-world current events or particular dates that will someday become impossible to reconcile should be either ignored or 'updated' with a more relevant substitute. Did a 60's Spider-Man comic reference the Beatles? Nowadays that reference might be to a more current music group such as One Direction (I'm so sorry, Bertone).
Hopefully I've cleared that up and not made everything even less understandable.
Until I figure out how to explain quantum mechanics without the use of a Flux Capacitor, I remain
frogoat